V tej študiji smo analizirali komposte iz hmeljevine (stebla in listi hmelja po obiranju storžkov) ter začeli oblikovati smernice za kompostiranje, namenjene hmeljarjem za pripravo kakovostnega komposta za poljedelske površine. Vsak od treh kompostnih kupov je bil pripravljena neposredno po obiranju hmeljevih storžkov septembra 2020, v trapezni obliki, visok 2 m, iz 15 ton sveže biomase. Razlike med kupi so bile v velikosti delcev, na katere je bila hmeljevina sesekljana, če je bil kup pokrit ali ne, dodatkih za kompostiranje in številu premetavanj kupa. Mikroorganizme v kompostih smo pregledali po 7 mesecih kompostiranja. Mikrobiološki svet kompostirane hmeljevine brez dodatkov je bil v glavnem sestavljen iz bakterij. Na splošno v vseh kompostih primanjkuje raznolikosti, kar je sicer ključna lastnost kakovostnega komposta. Število enot, ki tvorijo kolonije (CFU), je bilo v pričakovanem obsegu, vendar je treba te vrednosti jemati previdno. PDA gojišče spodbuja rast gliv in kvasovk, zato je imel kompost, ki smo mu na začetku dodali efektivne mikroorganizme, z najmanjšimi delci biomase in pokrit s folijo po enem mesecu, najvišje število CFU na tem gojišču zaradi fermentacije s kvasovkami.
EN Welcome to read new project results in scientific paper available on: Hop Biomass Composting Approach Impact on Compost Microbiological Properties
This sample study was used to take the snapshot of composts from hop biomass after harvest (stems and leaves of hop plants after hop cones harvest) and to start forming composting guidelines for hop growers to create quality compost for arable land. Each of three composting piles was prepared right after hop cones harvest in Sept. 2020 in a trapezoidal shape with a height of 2 m from 15 tonnes fresh biomass each. Differences among piles were in the size of the particles that the biomass was cut to, in coverage, in composting additives and in the number of pile turnings. We have reviewed the microbiological aspect composts after 7 months of composting. The microbial world of composted hop biomass solely (no other biomass added) is dominated by bacteria. In general, all composts lack diversity, which is main property of quality compost. The number of colonies forming units was in the range of expected, nevertheless, this unit has to be taken with precaution. PDA media stimulates growth of fungi and yeasts, therefore compost with effective microorganisms added at start, the smallest particles and foil cover after 1 month had the highest CFU on this media due to yeast fermentation.